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8N Draft Control

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Author  [Modern View]
Ron Potter

04-26-2011 08:05:07

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Undoubtedly this subject has been dealt with about as much as any here. I"ve read the posts.However, I am looking for some clarification and direction on a few items if some of you great and experienced "old salts" can provide it. I have a nice "51 8N, about finished with a light restoration, lotsa new parts. I"m about done, and never considered the lift assy, but then noticed (of course after I had the tractor apart and painted, and back together)that in position control the lift is fine. Can even lift round bales. But in draft...nothing. If I hold the draft lever down, I get a little lift. So I pulled the lift cover, adjusted the springs, etc by the instructions in the IT manual, assembled and same result. I have the cover off again and probably something is bent. So here"s the question:
Should the position mechanism snap and move away for draft control (mine doesn"t snap clear over) and does the position mechanism have no effect when in draft mode?

When installed and in draft mode, the lift control arm (long lever) doesn"t move the rocker lever close to what is pictured in the IT manual. It hardly moves at all, when feeling inside. The lift control arm doesn"t appear bent or arched; can it be bent up closer to the attachment point? I have pictures to send or post.

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04-26-2011 14:23:01

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 Re: 8N Draft Control in reply to rustyfarmall, 04-26-2011 08:05:07  
Quoting Removed, click Modern View to seeNone, as I said, "When you move Draft/Posn lever to Draft, the mechanism compresses the position ctrl spring, thus pulling bolt thru spring & retracting it away from the control arm pad.", so since it has no contact with control arm, it can not influence behavior.

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04-26-2011 09:11:57

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 Re: 8N Draft Control in reply to carpetfarmer, 04-26-2011 08:05:07  
Quoting Removed, click Modern View to see to add a tiny bit to Jack's post, regarding, your "and move away for draft control ".

When you move Draft/Posn lever to Draft, the mechanism compresses the position ctrl spring, thus pulling bolt thru spring & retracting it away from the control arm pad. This leaves the position of the control arm's lower end(at pump valve rocker) solely determined by the draft control link/draft ctrl spring input and the touch control eccentric input at top of control arm.

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04-26-2011 08:55:20

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 Re: 8N Draft Control in reply to Ron Potter, 04-26-2011 08:05:07  
I am not sure exactly what you mean by holding draft lever down but I assume you mean the one under seat? but I can answer a few of your questions.
first,yes position control will cause it to snap over,but you will have to hold control rod to rear like it would be when installed.
second that is correct, position control has no effect when in draft mode.
several things and several linkages can be worn,or bent.most common on the ones i've had apart is the draft plunger seat and linkage rod,and of course the cam follower pin is a common point of must be flat,and control draft linkage rod must be straight before any correct adjustments can be made.and any adjustments/repairs must be made to draft control mechanism before position control linkages can be set correctly.what does your cam follower pin look like?
I would strongly suggest zanes adjustment jig,the instructions alone that are included with it makes it a bargain.and it makes adjustments very easy to understand.

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Ron Potter

04-26-2011 14:11:47

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 Re: 8N Draft Control in reply to jackinok, 04-26-2011 08:55:20  
If the position control assembly is has no effect in draft, then does the dowel pin at the cam have any effect in draft mode?

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Ron Potter

04-26-2011 14:04:22

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 Re: 8N Draft Control in reply to jackinok, 04-26-2011 08:55:20  
Exactly right, the draft/position lever. Probably multiple items loose or worn inside. Actually, the 'pin' is not so worn. I've seen pics of some 1/2 worn, but this one is only about 1/4 worn.

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